Amphastar Pharmaceuticals (AMPH) Stock Chart & Stock Price History $22.99 -0.09 (-0.39%) As of 02:34 PM Eastern Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Amphastar Pharmaceuticals Stock Price Performance The Amphastar Pharmaceuticals (AMPH) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 42.53%, with a year-to-date return of -38.08%. In the past month, the stock has decreased 11.17%, reflecting recent market activity. As of the latest close, Amphastar Pharmaceuticals traded at $23.08 with a market cap of $1.09 billion and volume of 1.27 million shares. Five years ago, the stock traded at $22.12, representing a 3.93% increase over that period. At the time, it had a market cap of $996.50 million and a volume of 310,500 shares. 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Email Address 5 Day Performance-1.96%1 Month Performance-11.17%3 Month Performance-19.13%Year-To-Date Performance-38.08%1 Year Performance-42.53%5 Year Performance+3.93% AMPH Stock Chart for Monday, June, 30, 2025 AMPH Chart by TradingView Amphastar Pharmaceuticals Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization06/27/2025$23.18$23.08-0.43%$23.42$22.861.27 million shs$1.09 billion06/26/2025$23.45$23.18-1.15%$23.77$23.03517,512 shs$1.09 billion06/25/2025$24.58$23.45-4.60%$24.53$23.31426,861 shs$1.11 billion06/24/2025$24.68$24.58-0.41%$25.04$24.53395,481 shs$1.16 billion06/23/2025$24.56$24.68+0.49%$24.75$24.40409,007 shs$1.16 billion06/20/2025$25.34$24.56-3.08%$25.85$24.35672,732 shs$1.16 billion06/19/2025$25.34$25.34$25.80$25.26393,981 shs$1.19 billion06/18/2025$25.61$25.34-1.05%$25.80$25.26393,981 shs$1.19 billion06/17/2025$25.98$25.61-1.42%$26.06$25.54399,985 shs$1.21 billion06/16/2025$25.82$25.98+0.62%$26.03$25.59365,928 shs$1.22 billion Get the Latest News and Ratings for AMPH and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Amphastar Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 06/13/2025$26.44$25.82-2.34%$26.27$25.70402,402 shs$1.22 billion06/12/2025$26.05$26.44+1.50%$26.50$25.77506,968 shs$1.25 billion06/11/2025$26.92$26.05-3.23%$27.04$26.02528,186 shs$1.23 billion06/10/2025$26.62$26.92+1.13%$27.40$26.70624,898 shs$1.27 billion06/09/2025$25.99$26.62+2.42%$26.86$26.10514,479 shs$1.25 billion06/06/2025$25.52$25.99+1.84%$26.02$25.53359,174 shs$1.23 billion06/05/2025$25.86$25.52-1.31%$25.91$25.19555,155 shs$1.20 billion06/04/2025$26.01$25.86-0.58%$26.57$25.76395,476 shs$1.22 billion06/03/2025$25.38$26.01+2.48%$26.17$25.13526,254 shs$1.23 billion06/02/2025$25.88$25.38-1.93%$26.05$25.26656,448 shs$1.20 billion05/30/2025$25.64$25.88+0.94%$25.92$25.15460,917 shs$1.23 billion05/29/2025$25.26$25.64+1.50%$25.79$25.18524,687 shs$1.22 billion Related Companies AKRO Stock Chart PCVX Stock Chart ADMA Stock Chart PTCT Stock Chart RYTM Stock Chart CYTK Stock Chart KRYS Stock Chart ZLAB Stock Chart ACAD Stock Chart MRUS Stock Chart Receive AMPH Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Amphastar Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 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